液晶能写数据但是不显示，但是加个tim3初始化就能显示，这是为啥？

小小速 · 发表于 2016-2-28 19:31:05

[mw_shl_code=c,true] LCD_Init();
LCD_Clear(YELLOW);[/mw_shl_code]
像上面这样是没反应的，但是后面加一句Tim3_Init();当运行完tim3初始化的时候屏幕就显示黄色了
[mw_shl_code=c,true]void Tim3_Init(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);

/* Time Base configuration */
TIM_TimeBaseStructure.TIM_Prescaler = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_Period = 999;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1; //
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 1000; //
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OC3Init(TIM3, &TIM_OCInitStructure);//运行到到这一句设置完成后屏就显示了

TIM_ARRPreloadConfig(TIM3, ENABLE); //
TIM_Cmd(TIM3, ENABLE);
}[/mw_shl_code]